﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test1
{
    class Program
    {
        static void Main(string[] args)
        {
            const int length = 5;
            const int width = 4;
            Console.WriteLine("长方形的周长是："+ 2*(length+width));
            Console.WriteLine("长方形的面积是：" + length*width);

        }

    }
}
